if 3x-7y and xy=-1, find the value of 9x²+49y²​

Question

if 3x-7y and xy=-1, find the value of 9x²+49y²​

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Iris 1 month 2021-10-22T00:25:27+00:00 1 Answer 0 views 0

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    2021-10-22T00:26:39+00:00

    3x -7y = 10

    squaring on both sides

    we get

    (3x-7y)² = 10²

    => 9x² + 49 y² – 42 xy = 100

    => 9x² +49y² = 100 + 42(-1)

    = 100 – 42 = 58

    Hope this helps u

    Mark me as Brainiliest answer

    (Your question was incomplete I added 10 to make it complete question)

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